#include <Wire.h>
#include <LiquidCrystal_I2C.h>

const int moistureSensorPin = A0;  // Analog input pin that the soil moisture sensor is attached to
const int relayPin = 7;            // Digital pin that the relay is attached to
const int threshold = 500;         // Threshold value for soil moisture (adjust based on your sensor)

LiquidCrystal_I2C lcd(0x27, 16, 2);  // Set the LCD address to 0x27 for a 16 chars and 2 line display

void setup() {
  pinMode(relayPin, OUTPUT);       // Initialize the relay pin as an output
  digitalWrite(relayPin, HIGH);    // Make sure the relay is off initially
  Serial.begin(9600);              // Start serial communication for debugging
  lcd.init();                      // Initialize the LCD
  lcd.backlight();                 // Turn on the backlight
  lcd.print("Soil Moisture:");     // Print static text on the LCD
}

void loop() {
  int sensorValue = analogRead(moistureSensorPin);  // Read the value from the soil moisture sensor
  Serial.print("Soil Moisture Value: ");
  Serial.println(sensorValue);

  lcd.setCursor(0, 1);  // Move the cursor to the second line
  lcd.print(sensorValue);  // Print the sensor value

  if (sensorValue < threshold) {
    digitalWrite(relayPin, LOW);  // Turn the relay on (water the plant)
    Serial.println("Watering the plant");
  } else {
    digitalWrite(relayPin, HIGH); // Turn the relay off
    Serial.println("Soil is moist enough");
  }

  delay(2000);  // Wait for 2 seconds before taking another reading
}